Instead, pass the page id when using methods for a page. The change
avoids constructing Database a dummy page id when those methods aren't
going to be used.
getFromId doesn't seem like it needs a page id, since the linter id is
the primary key.
Also, a namespace id should no longer optional to setForPage. The
LinterWriteNamespaceColumnStage option already gates whether to include
it in the row.
Follows-Up: I9fd6e7724dcf33be0b1feb19ec8eb448738cab09
Change-Id: Ib3d3622144b670ebe1a4ce04e6db6811584d42c8
And addresses some other cleanup from review comments.
Follows-Up: I9fd6e7724dcf33be0b1feb19ec8eb448738cab09
Change-Id: If87b0bf91930f0f8d89ed046d18aadb8f346f9aa